Improvement in gas blow-pipes



A. H. Woon.

GAS BLOWPIPE,

10.40.370 Patented oct. 20, 1863.

UNITED STATES ALONZO H. WOOD, OF BOSTONV MASSACHUSETTS.

IMPROVEMENT IN GAS BLOW-PIPES.

Specification forming part of Letters Patent No. 40.376 dated October20, 1863.

To all whom 'it may concern Be it known that I, ALONZO H. WOOD, of"

Boston, in the county of Suffolk and State of Massachusetts, haveinvented an Improved Gas Blow-Pipe, of which the following isy aJ full,clear, and exact description, reference bet ing had to the accompanyingdrawings, mak ing part of this specification, in which- Figure l is aperspective view of my im-r proved apparatus. Fig. 2 is a verticalsection through the same; Fig. 3, details to be referred to hereinafter.

My invention relates to that class of blowpipes in which ordinaryilluminating-gas is burned, and which are used by jewelers and otherworkmen on .the bench for soldering and other purposes where an intenseheat is're quired; and it consists, first, inthe employment of one ormore reservoirs forfcontaining water or other volatile substances,provided with a means for heating the same so as to generate vapor,which is commingled with the gas and il'ame, and adds to the intensityof theheat; secondly, in a peculiar device, which, by nearly excludingthe air from the gas before it is burned, causes the flame (which, whenused i'or heat, is nearly colorless) to be changed so as to emit abright light, which can be used i'orilluminating purposes by the workmanwhen required.

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carl ried it out.l

In the accompanyingdrawings, A is the base, which 'is made hollow, so asto form reservoir for water or other volatile substance, which is pouredin at an opening providedv with a screw-plug, u.v A passage, b, for thevgas is formed iu the base A, which terminates in a tip or delivery, c.'At the other end this passage is tapped, and has` screwed into it ashort pipe, B, to which the gas is conducted by a exible pipe or othersuitable means,

and the pipe B is furnished with a'iregulator,

C, so as .to regulate the supply of gasi D is a cap, which isscrewedyinto the top of the base A, and is furnished with prongs orarinsd, which extend down into the water, as seen in Fig. 2, for apurpose that-will be hereinafter described.I This 4cap D is providedwith holes e, for the purpose of admitting air,

which is commingled with the gas before itis burned, and thus greatlyintensifies the heat ot' the iiaine. A screw -thread is turned withinthe'center of this cap-piece D of asize` .sufficient to' admit thescrew-thread on the lower end of the upright tube or pipe E, of brass orother suitable metal. Another circular cap, F, tits on the lower end ofthis tube, and' can move up and down thereon, so as to expose or coverthe holesc of the lower cappiece, D. The cap F has its edge milled for.'ease of raising and lowering the same. Whenu the cap F is' screwed downto cover the holes `e of the cap D, air is only admitted through theholes f in the cap F, and passes into the annular cavityon its underside and through the holes e, a small supply. of air being nec essaryfor the proper combustion of the gas and to prevent it from smoking whenused in so large a jet or delivery. v v

. For the purpose of still further reducing the supply of air, acircular plate, 9 is fitted over the capv F, and is furnished with holesh. This plate g may be turned so as to bring the holes h immediatelyover the holes f, or so as to-'close or partially close them, and may bethen secured in place by the screw-nut z', which works on a screwlthreadon the upper part ot' the cap F. E.

k are wires passing through flanges l and m, surrounding th'etube E, andserve to transmit the heat to the tube E and prongs d, Fig. 2, for thepurpose of heating the water so as t'ov produeevapor, which iseommingled with the gas to add to the intensity of the-heat. I havefound that without these .wires k the lower portion of the tube E willremain cool.

Whenla less degree of heat is required, the

size of the orifice at the top of the tube E may be contracted byinserting a tube, a, having an opening of the sine desired,'as seen inFig;v 3. y

H is another receptacle for holding water or other volatile substance,surrounding the tube E and wires k, and is suspended on the angem by -aturned edge at its top. The

water'withiu'- this reservoir E receives heat 'through the Casin g o,from the radiation of the heat of the wires k, and through the ange m.It is obvious that the reservoirs may be used separately ortogether, asmay 'be'desired It will be seen that the vapor from the res-l ervoir His mixed with the flame outside of the tube E, while that from thereservoir A is mixed with thc gas inside the tube E.

Operation: Thereservoirs being filled withV water or other volatilesubstance, a supply of gas is admitted into the passage b and throughthe tip cinto the tube E, the cap F being screwed up so as to admit airthrough the holes c, which passes between the prongs d, and is thenmixed with the gas as it rises in the tube E, at the top ot' which it isburned, producing a flame which is nearly colorless and possesses anintensedegree of heat. The wires 7c extend into the flame, and thustransmit heat to the tube E and prongs d and to the casing o and flangem,which heats the Water in the reservoirs, generati ng vapor, Which, asit rises, is commingled with the gas and flame for the purpose ot' still`further intensif ying the heat. The flame may be instantly changed, soas tov emit a bright light when required, by screwing down the cap F soas to cover over the holes e, a small supply of' air, sufficient toprevent it from smoking, being a means of heating the same, so as toproducey vapor to commingle with the gas and tlame for the purpose of'intensifying the heat, substantially as described.

2. The cap F, provided with holesf, and so arranged as to control theadmission of air through the holes c, in the manner and for the purposesubstantially as herein described.

A. H. WOOD.

Witnesses:

Tiros. R. Renon, P. E. Tnscnmmonnu.

